Judging by the comments here I guess I'm the only one that feels extremely awkward about this being written in Javascript. I don't mind wrappers but is this essentially just an ffmpeg wrapper in JS?
Is your problem with it the fact that it is a wrapper, or that it's javascript?
If you don't like that it's a wrapper, what is wrong with adding a wrapper that adds new functionality?
If you don't like that it's Javascript, how would another language somehow make this better? Especially with the sheer number of people that are already comfortable using Javascript.
You should try to learn JS - it's really awesome. Asynchronous, incredibly stable, battle tested by billions of users every day, it has one of the best open source module ecosystems in the world, and it runs everywhere.
If you don't like that it's a wrapper, what is wrong with adding a wrapper that adds new functionality?
If you don't like that it's Javascript, how would another language somehow make this better? Especially with the sheer number of people that are already comfortable using Javascript.